#include <cstddef>
typedef struct Node {
    int data;
    struct Node* left;
    struct Node* right;
} NODE;
NODE* root=NULL;
root=(NODE*)malloc(sizeof(NODE));
root->data=10;
root->left=NULL;
root->right=NULL;

NODE* BNODE=NULL;
BNULL=(NODE*)malloc(sizeof(NODE));
BNODE->data=20;
BNODE->left=NULL;
BNODE->right=NULL;
root->left=BNODE;


